Preparation method and application of barrier film and vacuum insulation panel

Abstract

The present application relates to a barrier film comprising: a base layer; the first barrier layer, the second barrier layer, the third barrier layer and the fourth barrier layer are sequentially stacked on the base layer; the first barrier layer and the third barrier layer are respectively a gas barrier layer and a water barrier layer, or the first barrier layer and the third barrier layer are respectively a water barrier layer and a gas barrier layer, the base layer is divided into a fitting area, a non-fitting area and a bonding area, the bonding area encloses the fitting area, ultraviolet light can penetrate through the first barrier layer and the third barrier layer, and ultraviolet light can penetrate through the non-fitting area. The second barrier layer is provided with a hollow first light-transmitting area, the fourth barrier layer is provided with a hollow second light-transmitting area, and the orthographic projection areas of the first light-transmitting area, the second light-transmitting area and the bonding area on the fourth barrier layer coincide. According to the vacuum insulation panel, ultraviolet rays can penetrate through the first light-transmitting area and the second light-transmitting area to directly irradiate the bonding area, and when the vacuum insulation panel is packaged through the barrier film, packaging can be simply and rapidly completed through UV glue.

Description

Technical Field

[0001] This application relates to thermal insulation materials, and more particularly to vacuum insulation panels. Background Technology

[0002] A thermal insulation layer is a material with heat insulation properties, used to improve the working effect of refrigeration or insulation devices. The thermal insulation performance of the insulation layer is an important factor affecting the actual power consumption of the refrigeration device, and the thickness of the insulation layer is a key factor affecting the effective space of the refrigeration device. The cost and processing efficiency of the insulation layer are also particularly important to the cost and efficiency of the product. VIP panels (Vacuum Insulation Panels) are a high-end type of insulation layer with low thermal conductivity and good heat insulation effect. VIP panels typically consist of a barrier film and a vacuum insulation core material. The vacuum insulation core material is usually a porous material. After vacuum treatment, the porous material is in a vacuum state inside, resulting in a very low thermal conductivity. The barrier film's role is to isolate the vacuum insulation core material from the external environment, maintaining the vacuum state of the vacuum insulation core material as much as possible. The manufacturing process of VIP panels typically includes the following steps: producing and drying the vacuum insulation core material; producing the barrier film and bagging the barrier film; pre-packing the dried vacuum insulation core material in bags and then vacuum sealing and edge binding. Vacuum sealing involves sealing a bag made of a barrier film in a vacuum environment, isolating the vacuum insulation core material from the external environment. UV adhesive can cure rapidly under ultraviolet light, which helps improve the efficiency of vacuum sealing; however, since the barrier film is usually formed by a composite of a resin film and a metal or metal oxide film, and the metal film does not support the transmission of ultraviolet light, the application of UV adhesive in the vacuum sealing stage is quite difficult. Summary of the Invention

[0003] This application provides a method for preparing a barrier film and a vacuum insulation panel, and its application, to solve the technical problem that UV adhesive is difficult to apply in the vacuum encapsulation stage of VIP panel manufacturing process.

[0004] In a first aspect, embodiments of this application provide a barrier film, the barrier film comprising:

[0005] grassroots level;

[0006] The first barrier layer, the second barrier layer, the third barrier layer, and the fourth barrier layer are sequentially stacked on the base layer;

[0007] A protective layer disposed on the fourth barrier layer,

[0008] Wherein, the first barrier layer and the third barrier layer are respectively a gas barrier layer and a water barrier layer, or the first barrier layer and the third barrier layer are respectively a water barrier layer and a gas barrier layer.

[0009] The base layer is divided into a bonding area, a non-bonding area, and an adhesive area. The bonding area is used to bond the vacuum insulation core material, and the adhesive area surrounds the bonding area.

[0010] The first and third barrier layers are made of materials that can transmit ultraviolet light. The second barrier layer has a first light-transmitting area, which is hollowed out. The fourth barrier layer has a second light-transmitting area, which is hollowed out. The first and second light-transmitting areas coincide with the orthographic projection area of ​​the adhesive area on the fourth barrier layer.

[0011] This application provides a first light-transmitting area and a second light-transmitting area. By hollowing out the first and second light-transmitting areas, ultraviolet rays can pass through them, allowing the ultraviolet rays to directly shine on the bonding area. This enables the bonding area to use UV adhesive. When encapsulating the vacuum insulation board through the barrier film, the encapsulation can be completed simply and quickly using UV adhesive.

[0012] In some embodiments of this application, the adhesive area includes:

[0013] A first adhesive area is disposed around the edge of the bonding area;

[0014] A second bonding area is set outside the first bonding area.

[0015] In some embodiments of this application, the materials of both the first barrier layer and the third barrier layer are polymers; and / or,

[0016] The materials of the second barrier layer and the fourth barrier layer are both metals or metal oxides.

[0017] In some embodiments of this application, the base layer is made of low-density polyethylene; and / or,

[0018] The thickness of the base layer is 30–80 μm.

[0019] In some embodiments of this application, the material of the first barrier layer is polyvinyl alcohol; and / or,

[0020] The thickness of the first barrier layer is 10–20 μm.

[0021] In some embodiments of this application, the material of the second barrier layer is at least one selected from aluminum, tin, and aluminum oxide; and / or,

[0022] The thickness of the second barrier layer is 30–100 nm.

[0023] In some embodiments of this application, the material of the third barrier layer is polyethylene terephthalate; and / or,

[0024] The thickness of the third barrier layer is 10–20 μm.

[0025] In some embodiments of this application, the material of the fourth barrier layer is at least one selected from aluminum, tin, and aluminum oxide; and / or,

[0026] The thickness of the fourth barrier layer is 30–100 nm.

[0027] In some embodiments of this application, the material of the protective layer is at least one selected from polyethylene terephthalate, polyamide, and polyvinylidene fluoride; and / or,

[0028] The thickness of the protective layer is 10–30 μm.

[0029] Secondly, embodiments of this application provide a method for preparing a vacuum insulation panel, the method comprising the following steps:

[0030] Provide at least one vacuum insulation core material, and provide the barrier film as described in any embodiment of the first aspect;

[0031] A UV adhesive is applied to the bonding area;

[0032] One surface of the vacuum insulation core material is attached to the bonding area of ​​the barrier film;

[0033] In a vacuum environment, the bonding area of ​​another barrier film is bonded to the other surface of the vacuum insulation core material;

[0034] The UV adhesive is cured by ultraviolet light, which bonds the barrier film attached to the upper and lower surfaces of the vacuum insulation core material.

[0035] In some embodiments of this application, the bonding area is further coated with an adhesive, and one surface of the vacuum insulation core material is bonded to the bonding area of ​​the barrier film, wherein the vacuum insulation core material and the bonding area are bonded together by the adhesive.

[0036] In some embodiments of this application, the adhesive is VHB tape.

[0037] In some embodiments of this application, the barrier film is recessed into the bonding area to form a groove, and the direction of the recess is from the base layer to the protective layer.

[0038] In some embodiments of this application, the number of vacuum insulation core materials is at least two. After the barrier film attached to the upper and lower surfaces of the vacuum insulation core materials is bonded together, the method for preparing the vacuum insulation panel further includes the following steps:

[0039] The membrane material connecting different vacuum insulation core materials is cut to form at least two vacuum insulation panels.

[0040] In some embodiments of this application, the method for preparing the vacuum insulation panel further includes the following steps:

[0041] Cut off any excess membrane material from the vacuum insulation panel.

[0042] In some embodiments of this application, the method for preparing the vacuum insulation panel further includes the following steps:

[0043] The vacuum insulation panel is dried after being left to stand.

[0044] Thirdly, this application provides an application of a vacuum insulation board, wherein the vacuum insulation board is a vacuum insulation board prepared by the method described in any embodiment of the second aspect, and the vacuum insulation board is applied to a refrigeration device or a heat preservation device.

[0045] In some embodiments of this application, the refrigeration device is any one of a refrigerator, freezer, refrigerated container, refrigerated truck, or automatic beverage vending machine.

[0046] The insulation device can be any one of a medical insulated box, a food insulated box, or a water heater. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the barrier film provided in Embodiment 1 of this application;

[0050] Figure 2 This is a schematic diagram of the structure of the first intermediate product provided in Embodiment 1 of this application;

[0051] Figure 3 This is a schematic diagram of the structure of the second intermediate product provided in Embodiment 1 of this application;

[0052] Figure 4 This is a schematic diagram of the structure of the vacuum insulation panel obtained in Embodiment 1 of this application;

[0053] Figure 5This is a schematic diagram of the structure of the third intermediate product provided in Embodiment 2 of this application;

[0054] Figure 6 This is a schematic diagram of the structure of the fourth intermediate product provided in Embodiment 4 of this application.

[0055] The reference numerals used in the accompanying drawings are explained as follows:

[0056] 124-Base layer, 123-First barrier layer, 1231-Second barrier layer, 122-Third barrier layer, 1221-Fourth barrier layer, 121-Protective layer, 12311-First light-transmitting zone, 12211-Second light-transmitting zone, 101-First membrane material, 102-Rectangular vacuum insulation core material, 1031-First irregularly shaped vacuum insulation core material, 1032-Second irregularly shaped vacuum insulation core material, 104-First colloid, 1041-Second colloid, 105-Second membrane material, 111-Rectangular vacuum insulation board, 112-First irregularly shaped vacuum insulation board, 113-Second irregularly shaped vacuum insulation board. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] Unless otherwise specified, the terminology used herein should be understood as having the meaning commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. In case of any conflict, this specification shall prevail. Unless otherwise specified, all raw materials, reagents, instruments, and equipment used in this application are commercially available or can be prepared by existing methods.

[0059] Various embodiments of this application may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a hard limitation on the scope of this application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Furthermore, whenever a numerical range is referred to herein, it means including any referenced number (fraction or integer) within the referred range.

[0060] In this application, unless otherwise stated, directional terms such as "upper" and "lower" specifically refer to the drawing directions in the accompanying drawings. Furthermore, in the description of this application, the terms "comprising," "including," etc., mean "including but not limited to." Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this document, "and / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone. For associations involving three or more related objects described using "and / or", it indicates that any one of the three related objects can exist alone, or at least two of them can exist simultaneously. For example, for A, and / or B, and / or C, it can mean that any one of A, B, and C exists alone, or any two of them exist simultaneously, or all three of them exist simultaneously. In this document, "at least one" means one or more, and "more than one" means two or more. "At least one", "at least one of the following", or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c", can both mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can each be single or multiple.

[0061] UV adhesives can cure rapidly under ultraviolet light, which is beneficial for improving the efficiency of vacuum sealing. However, since the barrier film is usually formed by a composite of a resin film and a metal or metal oxide film, and the metal film does not support the transmission of ultraviolet light, it makes the application of UV adhesives in the vacuum sealing stage more difficult.

[0062] The technical solution provided in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0063] In a first aspect, embodiments of this application provide a barrier film, the barrier film comprising:

[0064] grassroots level;

[0065] The first barrier layer, the second barrier layer, the third barrier layer, and the fourth barrier layer are sequentially stacked on the base layer;

[0066] A protective layer disposed on the fourth barrier layer,

[0067] Wherein, the first barrier layer and the third barrier layer are respectively a gas barrier layer and a water barrier layer, or the first barrier layer and the third barrier layer are respectively a water barrier layer and a gas barrier layer.

[0068] The base layer is divided into a bonding area, a non-bonding area, and an adhesive area. The bonding area is used to bond the vacuum insulation core material, and the adhesive area surrounds the bonding area.

[0069] The first and third barrier layers are made of materials that can transmit ultraviolet light. The second barrier layer has a first light-transmitting area, which is hollowed out. The fourth barrier layer has a second light-transmitting area, which is hollowed out. The first and second light-transmitting areas coincide with the orthographic projection area of ​​the adhesive area on the fourth barrier layer.

[0070] It is readily understood that the base layer described in this application is a functional layer in contact with the vacuum insulation core material, and it needs to possess good sealing performance, high flexibility, and mechanical strength. Those skilled in the art can select a suitable base layer based on common general knowledge.

[0071] It is easy to understand that barrier films typically have gas-blocking and water-blocking functions. In this application, a functional layer related to the gas-blocking function can be first set on the base layer, and then a functional layer related to the water-blocking function can be set. That is, the first barrier layer is set as a gas-blocking layer, the second barrier layer is set on the first barrier layer to enhance the gas-blocking effect, the third barrier layer is set as a water-blocking layer, and the fourth barrier layer is set on the third barrier layer to enhance the water-blocking effect. Alternatively, this application can first set a functional layer related to the water-blocking function on the base layer, and then a functional layer related to the gas-blocking function can be set. That is, the first barrier layer is set as a water-blocking layer, the second barrier layer is set on the first barrier layer to enhance the water-blocking effect, the third barrier layer is set as a gas-blocking layer, and the fourth barrier layer is set on the third barrier layer to enhance the gas-blocking effect.

[0072] Taking the case where the first barrier layer is set as a gas barrier layer as an example, the first barrier layer and the second barrier layer disposed on the first barrier layer work together to block gas, and the third barrier layer and the fourth barrier layer disposed on the third barrier layer work together to block water. The first and third barrier layers are usually made of ultraviolet-transmitting polymer materials, which, while possessing certain gas and water blocking functions, also have flexibility and good processability. The second and fourth barrier layers are made of metals or metal oxides, which usually have excellent gas and water blocking functions, but poor processability. Therefore, this application uses a combination of the first and second barrier layers to jointly achieve a gas barrier function, balancing high gas barrier performance and processability; a similar principle applies to the third and fourth barrier layers of this application. It should also be noted that some technical solutions in this field achieve the effect of blocking gas and water with only a single metal layer; however, in this application, the second barrier layer is hollowed out in the first light-transmitting area, and the fourth barrier layer is hollowed out in the second light-transmitting area. The hollowed-out part cannot play the role of blocking gas and water, so this application must set a first barrier layer and a third barrier layer.

[0073] It is easy to understand that the function of the protective layer is to provide tensile and puncture resistance, and to protect other functional layers from external mechanical damage.

[0074] This application provides a first light-transmitting area and a second light-transmitting area. By hollowing out the first and second light-transmitting areas, ultraviolet rays can pass through them, allowing the ultraviolet rays to directly shine on the bonding area. This enables the bonding area to use UV adhesive. When encapsulating the vacuum insulation board through the barrier film, the encapsulation can be completed simply and quickly using UV adhesive.

[0075] In some embodiments of this application, the adhesive area includes:

[0076] A first adhesive area is disposed around the edge of the bonding area;

[0077] A second bonding area is set outside the first bonding area.

[0078] It is easy to understand that the first adhesive area is wrapped around the edge of the bonding area. After UV adhesive is applied to the first adhesive area and cured, the vacuum insulation core material can be completely encapsulated. The vacuum state of the vacuum insulation core material is mainly maintained by the UV adhesive that is well encapsulated in the first adhesive area. When encapsulating the vacuum insulation core material, if the air pressure changes too quickly, the adhesive in the first adhesive area may detach due to the sudden pressure change, thus affecting the overall sealing and performance of the product. To solve this problem, a second adhesive area can be added around the first adhesive area. The second adhesive area is also coated with UV adhesive, which can provide additional adhesive force. In addition, if the first adhesive area has detached, the Darwin UV adhesive in the second adhesive area can still maintain the adhesive state, which can ensure that the relative position of the membrane material does not change. As the air pressure gradually stabilizes, the barrier films on both sides of the vacuum insulation core material will move closer to each other again, and the first adhesive area can be re-bonded.

[0079] In some embodiments of this application, the materials of both the first barrier layer and the third barrier layer are polymers; and / or,

[0080] The materials of the second barrier layer and the fourth barrier layer are both metals or metal oxides.

[0081] It's easy to understand that many polymer materials are transparent to ultraviolet light, while metals or metal oxides typically have a strong barrier effect against water and gases. Polymer materials generally possess good flexibility, and when combined with metals or metal oxides, they can maintain their processability while exhibiting strong water and gas barrier capabilities.

[0082] In some embodiments of this application, the base layer is made of low-density polyethylene; and / or,

[0083] The thickness of the base layer is 30–80 μm.

[0084] Low-density polyethylene has good flexibility, acid and alkali resistance, and resistance to low and high temperatures, making it suitable as a material for the base layer.

[0085] The advantage of having a base layer thickness of 30-80 μm is that it can ensure both high mechanical strength and maximum flexibility of the base layer.

[0086] As an example, the thickness of the base layer can be 30um, 40um, 50um, 60um, 70um, or 80um.

[0087] In some embodiments of this application, the material of the first barrier layer is polyvinyl alcohol; and / or,

[0088] The thickness of the first barrier layer is 10–20 μm.

[0089] Polyvinyl alcohol has good processability and good gas barrier properties, making it suitable as a material for the first barrier layer.

[0090] As an example, the thickness of the first barrier layer can be 10um, 12um, 14um, 16um, 18um, or 20um.

[0091] In some embodiments of this application, the material of the second barrier layer is at least one selected from aluminum, tin, and aluminum oxide; and / or,

[0092] The thickness of the second barrier layer is 30–100 nm.

[0093] It is easy to understand that aluminum, tin, and aluminum oxide all have good water and gas barrier properties and are easy to prepare.

[0094] As an example, the thickness of the second barrier layer can be 30nm, 40nm, 50nm, 80nm, or 100nm.

[0095] In some embodiments of this application, the material of the third barrier layer is polyethylene terephthalate; and / or,

[0096] The thickness of the third barrier layer is 10–20 μm.

[0097] Polyethylene terephthalate has excellent flexibility, good processing performance, and good water barrier properties.

[0098] As an example, the thickness of the third barrier layer can be 10um, 12um, 14um, 16um, 18um, or 20um.

[0099] In some embodiments of this application, the material of the fourth barrier layer is at least one selected from aluminum, tin, and aluminum oxide; and / or,

[0100] The thickness of the fourth barrier layer is 30–100 nm.

[0101] It is easy to understand that aluminum, tin, and aluminum oxide all have good water and gas barrier properties and are easy to prepare.

[0102] As an example, the thickness of the fourth barrier layer can be 30nm, 40nm, 50nm, 80nm, or 100nm.

[0103] In some embodiments of this application, the material of the protective layer is at least one selected from polyethylene terephthalate, polyamide, and polyvinylidene fluoride; and / or,

[0104] The thickness of the protective layer is 10–30 μm.

[0105] The function of the protective layer is to provide tensile strength and puncture resistance. Polyethylene terephthalate, polyamide, and polyvinylidene fluoride can all be used as materials for the protective layer.

[0106] As an example, the thickness of the protective layer can be 10um, 15um, 20um, 25um, or 30um.

[0107] Secondly, embodiments of this application provide a method for preparing a vacuum insulation panel, the method comprising the following steps:

[0108] S1: Provide at least one vacuum insulation core material, and provide the barrier film as described in any embodiment of the first aspect;

[0109] S2: Apply UV adhesive to the bonding area;

[0110] S3: Attach one surface of the vacuum insulation core material to the bonding area of ​​the barrier film;

[0111] S4: In a vacuum environment, attach the bonding area of ​​another barrier film to the other surface of the vacuum insulation core material.

[0112] S5: The UV adhesive is cured by ultraviolet light, which bonds the barrier film that is attached to the upper and lower surfaces of the vacuum insulation core material.

[0113] As is easily understood, UV adhesive refers to adhesive products that cure under ultraviolet light by polymerizing small molecules into polymers. The UV adhesive described in this application is available on the market.

[0114] As is easily understood, vacuum insulation core material is a material designed to provide efficient thermal insulation performance in a vacuum environment. It typically has a porous or special structure to reduce solid-state heat conduction and further suppress gas-state heat conduction and convection under vacuum conditions. As examples, the material of the vacuum insulation core material may include at least one of aerogel, porous ceramics, microporous glass, and organic plastics. The vacuum insulation core material described in this application can be of a regular shape or an irregular shape.

[0115] The method described in this application can simultaneously encapsulate multiple vacuum insulation core materials. Traditional methods require bagging and vacuum-sealing each core material individually, while this method simplifies the process by splicing multiple core materials together and sealing them under vacuum. This addresses, to some extent, the complex manufacturing process of vacuum insulation panels. In particular, for irregularly shaped vacuum insulation core materials, this method can also splice them into more regular shapes. Since excess barrier film needs to be cut later, this method reduces barrier film waste by splicing irregularly shaped vacuum insulation core materials.

[0116] In some embodiments of this application, the bonding area is further coated with an adhesive, and one surface of the vacuum insulation core material is bonded to the bonding area of ​​the barrier film, wherein the vacuum insulation core material and the bonding area are bonded together by the adhesive.

[0117] In some embodiments of this application, the adhesive is VHB tape.

[0118] VHB tape is a high-performance double-sided foam tape launched by 3M, short for Very High Bond tape. VHB tape has excellent adhesive properties and long-lasting adhesion, and can be used to bond a variety of materials, including metals, glass, plastics, and wood. It is heat-resistant, weather-resistant, and has high shear and tear strength.

[0119] In some embodiments of this application, the barrier film is recessed into the bonding area to form a groove, and the direction of the recess is from the base layer to the protective layer.

[0120] It should be noted that the purpose of bonding the vacuum insulation core material to the bonding area using the adhesive, or designing a groove in the barrier film at the bonding area, is to fix the vacuum insulation core material and the barrier film relatively, preventing displacement of the vacuum insulation core material. These are optional steps. In some cases, these two methods are preferred, for example, when irregularly shaped vacuum insulation core materials are spliced ​​together with small gaps, and displacement should be avoided as much as possible. Furthermore, these two methods can be implemented simultaneously. The groove can be formed by hot pressing.

[0121] In some embodiments of this application, the number of vacuum insulation core materials is at least two. After the barrier film attached to the upper and lower surfaces of the vacuum insulation core materials is bonded together, the method for preparing the vacuum insulation panel further includes the following steps:

[0122] S6: Cut the membrane material connecting different vacuum insulation core materials to form at least two vacuum insulation panels.

[0123] In some embodiments of this application, the method for preparing the vacuum insulation panel further includes the following steps:

[0124] S7: Trim any excess membrane material from the vacuum insulation panel.

[0125] In some embodiments of this application, the method for preparing the vacuum insulation panel further includes the following steps:

[0126] The vacuum insulation panel is dried after being left to stand.

[0127] In the preparation of vacuum insulation panels, drying after settling is an important follow-up step that helps ensure the performance and quality of the panels. Before drying, the vacuum insulation panels typically need to be set for a period of time. This allows sufficient time for the adhesive to flow and penetrate within the panel, ensuring uniform distribution and full adhesion to the membrane and core material. The settling time depends on the type and properties of the adhesive, as well as the size and thickness of the vacuum insulation panel. After settling, the vacuum insulation panels are placed in a drying apparatus. The drying temperature and time should be determined based on the curing requirements of the adhesive and the material properties of the vacuum insulation panel. Dried vacuum insulation panels exhibit higher stability and durability. They are better able to resist the influence of external environments, such as temperature and humidity changes, thus maintaining their insulation performance and service life.

[0128] Thirdly, this application provides an application of a vacuum insulation board, wherein the vacuum insulation board is a vacuum insulation board prepared by the method described in any embodiment of the second aspect, and the vacuum insulation board is applied to a refrigeration device or a heat preservation device.

[0129] The application of the vacuum insulation board is realized based on the vacuum insulation board prepared by the method described in any embodiment of the second aspect. The specific implementation of the application of the vacuum insulation board can be referred to the above embodiments and common knowledge in the field. Since the application of the vacuum insulation board adopts some or all of the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0130] In some embodiments of this application, the refrigeration device is any one of a refrigerator, freezer, refrigerated container, refrigerated truck, or automatic beverage vending machine.

[0131] The insulation device can be any one of a medical insulated box, a food insulated box, or a water heater.

[0132] The present application is further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the application. Experimental methods in the following embodiments that do not specify specific conditions are generally determined according to industry standards. If there is no corresponding industry standard, then common international standards, conventional conditions, or conditions recommended by the manufacturer are followed.

[0133] Example 1

[0134] First, this embodiment provides a barrier film, the barrier film comprising:

[0135] 124 at the grassroots level;

[0136] A first barrier layer 123 is disposed on one side of the base layer 124;

[0137] A second barrier layer 1231 is disposed on the first barrier layer 123;

[0138] A third barrier layer 122 is disposed on the second barrier layer 1231;

[0139] A fourth barrier layer 1221 is disposed on the third barrier layer 122;

[0140] The protective layer 121 disposed on the fourth barrier layer 1221

[0141] Wherein, the first barrier layer 123 and the third barrier layer 122 are respectively a gas barrier layer and a water barrier layer;

[0142] The other side of the base layer 124 is divided into a bonding area, a non-bonding area, and an adhesive area. The bonding area is used to bond the vacuum insulation core material, and the adhesive area surrounds the bonding area.

[0143] The second barrier layer 1231 has a first light-transmitting area 12311, which is hollowed out. The first light-transmitting area 12311 coincides with the orthographic projection area of ​​the adhesive area on the second barrier layer 1231.

[0144] The fourth barrier layer 1221 is provided with a second light-transmitting area 12211, which is hollowed out, and the second light-transmitting area 12211 coincides with the orthographic projection area of ​​the adhesive area on the fourth barrier layer 1221.

[0145] The bonding area includes a first bonding area surrounding the edge of the bonding area.

[0146] The base layer 124 is made of low-density polyethylene and has a thickness of 50 μm.

[0147] The material of the first barrier layer 123 is polyvinyl alcohol, and the thickness of the first barrier layer 123 is 15 μm.

[0148] The second barrier layer 1231 is an aluminum foil, and the thickness of the second barrier layer 1231 is 30-100 nm.

[0149] The material of the third barrier layer 122 is polyethylene terephthalate, and the thickness of the third barrier layer 122 is 10-20 μm.

[0150] The fourth barrier layer 1221 is made of aluminum foil, and its thickness is 30-100 nm.

[0151] The protective layer 121 is made of polyamide and has a thickness of 10–30 μm.

[0152] This embodiment also provides a method for preparing a vacuum insulation panel, the method comprising the following steps:

[0153] Sa: Provides a first membrane material 101, a second membrane material 105, a rectangular vacuum insulation core material 102, a first irregularly shaped vacuum insulation core material 1031, and a second irregularly shaped vacuum insulation core material 1032, wherein the first membrane material and the second membrane material are both barrier films as described in this embodiment.

[0154] Sb: An adhesive is provided in the area where the first membrane material 101 is to be bonded to the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032. UV adhesive is applied to the outer edge area of ​​the area where the adhesive is provided to form a first adhesive 104, wherein the adhesive is VHB tape and the UV adhesive is polyurethane hot melt adhesive.

[0155] Sc: One side of the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032 are attached to the first membrane material 101 and bonded to the first membrane material 101 using the adhesive to form a first intermediate product. The structure of the first intermediate product is as follows: Figure 2 As shown;

[0156] Sd: Under a vacuum environment with a pressure of 1 Pa, the second membrane material 105 is controlled to slowly approach the other side of the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032 until the second membrane material 105 is bonded to the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032.

[0157] Se: By irradiating the UV adhesive with ultraviolet light, the UV adhesive is cured and bonded to the first membrane 101 and the second membrane 105 surrounding the vacuum insulation core material, resulting in a second intermediate product. The structure of the second intermediate product is as follows: Figure 3 As shown;

[0158] Sf: The membrane material connecting different vacuum insulation core materials is cut to form a rectangular vacuum insulation panel 111, a first irregularly shaped vacuum insulation panel 112, and a second irregularly shaped vacuum insulation panel 113. After trimming the excess membrane material from the edges of the rectangular vacuum insulation panel 111, the first irregularly shaped vacuum insulation panel 112, and the second irregularly shaped vacuum insulation panel 113, they are left to stand and then dried. The structures of the resulting vacuum insulation panels are as follows: Figure 4 As shown.

[0159] Additionally, it should be noted that, in order to more clearly illustrate the structure of the second intermediate product, Figure 3 The first irregularly shaped vacuum insulation core material 1031 and the second irregularly shaped vacuum insulation core material 1032 are not completely covered by the second membrane material 105. It should be understood that in the actual implementation process of this embodiment, the second membrane material 105 is regarded as completely covering the first irregularly shaped vacuum insulation core material 1031 and the second irregularly shaped vacuum insulation core material 1032.

[0160] Example 2

[0161] The difference between this embodiment and Embodiment 1 lies only in that: the first barrier layer 123 and the third barrier layer 122 are respectively a water-blocking layer and a gas-blocking layer; the material of the first barrier layer 123 is polyethylene terephthalate, and the thickness of the first barrier layer 123 is 10-20 μm; the material of the third barrier layer 122 is polyvinyl alcohol, and the thickness of the third barrier layer 122 is 15 μm.

[0162] Example 3

[0163] The main difference between this embodiment and Embodiment 1 is that the bonding area includes not only a first bonding area surrounding the edge of the bonding area, but also a second bonding area disposed around the first bonding area. In step Sb, in addition to applying UV adhesive to the outer edge region of the area where the adhesive is disposed to form a first adhesive 104, a second adhesive 1041 is also applied to the outer periphery of the first adhesive 104.

[0164] The specific details of this embodiment are as follows:

[0165] First, this embodiment provides a barrier film, the barrier film comprising:

[0166] 124 at the grassroots level;

[0167] A first barrier layer 123 is disposed on one side of the base layer 124;

[0168] A second barrier layer 1231 is disposed on the first barrier layer 123;

[0169] A third barrier layer 122 is disposed on the second barrier layer 1231;

[0170] A fourth barrier layer 1221 is disposed on the third barrier layer 122;

[0171] The protective layer 121 disposed on the fourth barrier layer 1221

[0172] in,

[0173] The other side of the base layer 124 is divided into a bonding area, a non-bonding area, and an adhesive area. The bonding area is used to bond the vacuum insulation core material, and the adhesive area surrounds the bonding area.

[0174] The second barrier layer 1231 has a first light-transmitting area 12311, which is hollowed out. The first light-transmitting area 12311 coincides with the orthographic projection area of ​​the adhesive area on the second barrier layer 1231.

[0175] The fourth barrier layer 1221 is provided with a second light-transmitting area 12211, which is hollowed out, and the second light-transmitting area 12211 coincides with the orthographic projection area of ​​the adhesive area on the fourth barrier layer 1221.

[0176] The bonding area includes: a first bonding area surrounding the edge of the bonding area; and a second bonding area disposed around the periphery of the first bonding area.

[0177] The base layer 124 is made of low-density polyethylene and has a thickness of 50 μm.

[0178] The material of the first barrier layer 123 is polyvinyl alcohol, and the thickness of the first barrier layer 123 is 15 μm.

[0179] The second barrier layer 1231 is an aluminum foil, and the thickness of the second barrier layer 1231 is 30-100 nm.

[0180] The material of the third barrier layer 122 is polyethylene terephthalate, and the thickness of the third barrier layer 122 is 10-20 μm.

[0181] The fourth barrier layer 1221 is made of aluminum foil, and its thickness is 30-100 nm.

[0182] The protective layer 121 is made of polyamide and has a thickness of 10–30 μm.

[0183] This embodiment also provides a method for preparing a vacuum insulation panel, the method comprising the following steps:

[0184] Sa: Provides a first membrane material 101, a second membrane material 105, a rectangular vacuum insulation core material 102, a first irregularly shaped vacuum insulation core material 1031, and a second irregularly shaped vacuum insulation core material 1032;

[0185] Sb: An adhesive is provided in the area where the first membrane material 101 is to be bonded to the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032. UV adhesive is applied to the outer edge area of ​​the area where the adhesive is provided to form a first adhesive 104. UV adhesive is applied to the outer edge of the first adhesive 104 to form a second adhesive 1041. The adhesive is VHB tape and the UV adhesive is polyurethane hot melt adhesive.

[0186] Sc: One side of the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032 are attached to the first membrane material 101 and bonded to the first membrane material 101 by the adhesive.

[0187] Sd: Under a vacuum environment with a pressure of 1 Pa, the second membrane material 105 is controlled to slowly approach the other side of the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032 until the second membrane material 105 is bonded to the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032.

[0188] Se: By irradiating the UV adhesive with ultraviolet light, the UV adhesive is cured and bonded to the first membrane 101 and the second membrane 105 surrounding the vacuum insulation core material, a third intermediate product is obtained. The structure of the third intermediate product is as follows: Figure 5 As shown;

[0189] Sf: Cut the membrane material connecting different vacuum insulation core materials to form a rectangular vacuum insulation board 111, a first irregularly shaped vacuum insulation board 112, and a second irregularly shaped vacuum insulation board 113. After trimming the excess membrane material at the edges of the rectangular vacuum insulation board 111, the first irregularly shaped vacuum insulation board 112, and the second irregularly shaped vacuum insulation board 113, let them stand and then dry them.

[0190] Additionally, it should be noted that, in order to more clearly illustrate the structure of the second intermediate product, Figure 5 The first irregularly shaped vacuum insulation core material 1031 and the second irregularly shaped vacuum insulation core material 1032 are not completely covered by the second membrane material 105. It should be understood that in the actual implementation process of this embodiment, the second membrane material 105 is regarded as completely covering the first irregularly shaped vacuum insulation core material 1031 and the second irregularly shaped vacuum insulation core material 1032.

[0191] Example 4

[0192] The difference between this embodiment and Embodiment 1 is only that: in step Sa, the first film 101, which is to be bonded to the vacuum insulation core material, is subjected to hot pressing treatment, so that grooves are formed on the film 101 that are adapted to the shapes of the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032 respectively; in step Sb, the adhesive is placed in the grooves, and the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032 are bonded to the corresponding grooves.

[0193] Example 5

[0194] The main difference between this embodiment and Embodiment 1 is that this embodiment does not use irregularly shaped vacuum insulation core material.

[0195] The specific details of this embodiment are as follows:

[0196] First, this embodiment provides a barrier film, the barrier film comprising:

[0197] 124 at the grassroots level;

[0198] A first barrier layer 123 is disposed on one side of the base layer 124;

[0199] A second barrier layer 1231 is disposed on the first barrier layer 123;

[0200] A third barrier layer 122 is disposed on the second barrier layer 1231;

[0201] A fourth barrier layer 1221 is disposed on the third barrier layer 122;

[0202] The protective layer 121 disposed on the fourth barrier layer 1221

[0203] in,

[0204] The other side of the base layer 124 is divided into a bonding area, a non-bonding area, and an adhesive area. The bonding area is used to bond the vacuum insulation core material, and the adhesive area surrounds the bonding area.

[0205] The second barrier layer 1231 has a first light-transmitting area 12311, which is hollowed out. The first light-transmitting area 12311 coincides with the orthographic projection area of ​​the adhesive area on the second barrier layer 1231.

[0206] The fourth barrier layer 1221 is provided with a second light-transmitting area 12211, which is hollowed out, and the second light-transmitting area 12211 coincides with the orthographic projection area of ​​the adhesive area on the fourth barrier layer 1221.

[0207] The bonding area includes: a first bonding area surrounding the edge of the bonding area; and a second bonding area disposed around the periphery of the first bonding area.

[0208] The base layer 124 is made of low-density polyethylene and has a thickness of 50 μm.

[0209] The material of the first barrier layer 123 is polyvinyl alcohol, and the thickness of the first barrier layer 123 is 15 μm.

[0210] The second barrier layer 1231 is an aluminum foil, and the thickness of the second barrier layer 1231 is 30-100 nm.

[0211] The material of the third barrier layer 122 is polyethylene terephthalate, and the thickness of the third barrier layer 122 is 10-20 μm.

[0212] The fourth barrier layer 1221 is made of aluminum foil, and its thickness is 30-100 nm.

[0213] The protective layer 121 is made of polyamide and has a thickness of 10–30 μm.

[0214] This embodiment also provides a method for preparing a vacuum insulation panel, the method comprising the following steps:

[0215] Sa: Provides a first membrane material 101, a second membrane material 105, a rectangular vacuum insulation core material 102, a first irregularly shaped vacuum insulation core material 1031, and a second irregularly shaped vacuum insulation core material 1032;

[0216] Sb: An adhesive is provided in the area where the first membrane material 101 is to be bonded to the rectangular vacuum insulation core material 102, the first irregularly shaped vacuum insulation core material 1031, and the second irregularly shaped vacuum insulation core material 1032. UV adhesive is applied to the outer edge area of ​​the area where the adhesive is provided to form a first adhesive 104. UV adhesive is applied to the outer edge of the first adhesive 104 to form a second adhesive 1041. The adhesive is VHB tape and the UV adhesive is polyurethane hot melt adhesive.

[0217] Sc: One side of the rectangular vacuum insulation core material 102 is attached to the first membrane material 101 and bonded to the first membrane material 101 by the adhesive;

[0218] Sd: In a vacuum environment with a pressure of 1 Pa, control the second membrane material 105 to slowly approach the other side of the rectangular vacuum insulation core material 102 until the second membrane material 105 and the rectangular vacuum insulation core material 102 are bonded together.

[0219] Se: By irradiating the UV adhesive with ultraviolet light, the UV adhesive is cured and bonded to the first membrane 101 and the second membrane 105 surrounding the vacuum insulation core material, resulting in a fourth intermediate product. The structure of the fourth intermediate product is as follows: Figure 6 As shown;

[0220] Sf: Cut the membrane material connecting different vacuum insulation core materials to form a rectangular vacuum insulation board. After trimming the excess membrane material at the edge of the rectangular vacuum insulation board, let it stand and then dry it to obtain the vacuum insulation board.

[0221] In the above embodiments 1 to 4, a first light-transmitting area and a second light-transmitting area are provided. By hollowing out the first light-transmitting area and the second light-transmitting area, ultraviolet rays can pass through the first light-transmitting area and the second light-transmitting area, so that ultraviolet rays can directly shine on the bonding area. This allows the bonding area to use UV glue. When the vacuum insulation board is encapsulated through the barrier film, the encapsulation can be completed simply and quickly using UV glue.

[0222] The methods described in Examples 1-3 above can simultaneously encapsulate multiple vacuum insulation core materials. Traditional methods require bagging and vacuum-sealing each vacuum insulation core material, while the above examples can splice multiple vacuum insulation core materials together and encapsulate them under vacuum, simplifying the process. This, to a certain extent, solves the technical problem of complex manufacturing processes for vacuum insulation boards. In particular, for irregularly shaped vacuum insulation core materials, this method can also splice them into more regular shapes. Since excess barrier film needs to be cut later, this method reduces the waste of barrier film by splicing irregularly shaped vacuum insulation core materials.

[0223] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A barrier film, characterized in that, The barrier film includes: grassroots level; The first barrier layer, the second barrier layer, the third barrier layer, and the fourth barrier layer are sequentially stacked on the base layer; A protective layer disposed on the fourth barrier layer, Wherein, the first barrier layer and the third barrier layer are respectively a gas barrier layer and a water barrier layer, or the first barrier layer and the third barrier layer are respectively a water barrier layer and a gas barrier layer. The base layer is divided into a bonding area, a non-bonding area, and an adhesive area. The bonding area is used to bond the vacuum insulation core material, and the adhesive area surrounds the bonding area. The first and third barrier layers are made of materials that can transmit ultraviolet light. The second barrier layer has a first light-transmitting area, which is hollowed out. The fourth barrier layer has a second light-transmitting area, which is hollowed out. The first and second light-transmitting areas coincide with the orthographic projection area of ​​the adhesive area on the fourth barrier layer.

2. The barrier film according to claim 1, characterized in that, The bonding area includes: A first adhesive area is disposed around the edge of the bonding area; A second bonding area is set outside the first bonding area.

3. The barrier film according to claim 1, characterized in that, Both the first and third barrier layers are made of polymers; and / or, The materials of the second barrier layer and the fourth barrier layer are both metals or metal oxides.

4. The barrier film according to claim 1, characterized in that, The base layer is made of low-density polyethylene; and / or, The thickness of the base layer is 30–80 μm.

5. The barrier film according to claim 1, characterized in that, The material of the first barrier layer is polyvinyl alcohol; and / or, The thickness of the first barrier layer is 10–20 μm.

6. The barrier film according to claim 1, characterized in that, The material of the second barrier layer is at least one of aluminum, tin, and aluminum oxide; and / or, The thickness of the second barrier layer is 30–100 nm.

7. The barrier film according to claim 1, characterized in that, The material of the third barrier layer is polyethylene terephthalate; and / or... The thickness of the third barrier layer is 10–20 μm.

8. The barrier film according to claim 1, characterized in that, The material of the fourth barrier layer is at least one of aluminum, tin, and aluminum oxide; and / or, The thickness of the fourth barrier layer is 30–100 nm.

9. The barrier film according to claim 1, characterized in that, The protective layer is made of at least one of polyethylene terephthalate, polyamide, and polyvinylidene fluoride; and / or... The thickness of the protective layer is 10–30 μm.

10. A method for preparing a vacuum insulation panel, characterized in that, The method for preparing the vacuum insulation panel includes the following steps: Provide at least one vacuum insulation core material, and provide the barrier film according to any one of claims 1 to 9; A UV adhesive is applied to the bonding area; One surface of the vacuum insulation core material is attached to the bonding area of ​​the barrier film; In a vacuum environment, the bonding area of ​​another barrier film is bonded to the other surface of the vacuum insulation core material; The UV adhesive is cured by ultraviolet light, which bonds the barrier film attached to the upper and lower surfaces of the vacuum insulation core material.

11. The method for preparing a vacuum insulation panel according to claim 10, characterized in that, The bonding area is also coated with an adhesive, and one surface of the vacuum insulation core material is bonded to the bonding area of ​​the barrier film, wherein the vacuum insulation core material and the bonding area are bonded together by the adhesive.

12. The method for preparing a vacuum insulation panel according to claim 11, characterized in that, The adhesive is VHB tape.

13. The method for preparing a vacuum insulation panel according to claim 10, characterized in that, The barrier film is recessed into the bonding area to form a groove, and the direction of the recess is from the base layer to the protective layer.

14. The method for preparing a vacuum insulation panel according to claim 10, characterized in that, The number of vacuum insulation core materials is at least two. After the barrier film is bonded to the upper and lower surfaces of the vacuum insulation core materials, the method for preparing the vacuum insulation panel further includes the following steps: The membrane material connecting different vacuum insulation core materials is cut to form at least two vacuum insulation panels.

15. The method for preparing a vacuum insulation panel according to claim 10, characterized in that, The method for preparing the vacuum insulation panel further includes the following steps: Cut off any excess membrane material from the vacuum insulation panel.

16. The method for preparing a vacuum insulation panel according to claim 10, characterized in that, The method for preparing the vacuum insulation panel further includes the following steps: The vacuum insulation panel is dried after being left to stand.

17. An application of a vacuum insulation panel, characterized in that, The vacuum insulation board is a vacuum insulation board prepared by the method described in any one of claims 10 to 16, and the vacuum insulation board is used in a refrigeration device or a heat preservation device.

18. The application of the vacuum insulation panel according to claim 17, characterized in that, The refrigeration device can be any one of a refrigerator, freezer, refrigerated container, refrigerated truck, or automatic beverage vending machine. The insulation device can be any one of a medical insulated box, a food insulated box, or a water heater.

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